Arithmetic series
等差级数
🧩 词语组成解析
🗣️ 情景例句
And thanks for the advice about the house.
也谢谢你关于房子的建议。
A burnt child dreads the fire.
一朝被蛇咬，十年怕井绳。
It was used for keeping tea hot after it was made,said Wei Hua. It was filled with hot water.
“那是在茶沏好后用来保温的，”魏华说，“用来装热开水的。”